/*
 * Syntelos 'SX'
 * Copyright (C) 1998, 2007  John Pritchard.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */
package syntelos.sx.methods;

import syntelos.sx.Request;
import syntelos.sx.Response;

import alto.io.Output;
import alto.lang.Buffer;
import alto.sys.Reference;


/**
 * Single server atomic get of an index value as a hex plain string.
 * 
 * @see Lock
 * @see Unlock
 * @see Inc
 * @see Dec
 * @since 1.6
 */
public class Value
    extends syntelos.sx.Response
{

    public Value(){
        super();
    }


    public void respond(Request req)
        throws java.io.IOException,
               java.lang.InterruptedException
    {
        Reference reference;
        if (request.hasNotReference())
            reference = Request.ReferenceToIndex(req);
        else
            reference = req.getReference();

        alto.lang.Value value;
        try {
            reference.lockReadEnter();
            value = alto.lang.Value.Dereference(reference);
            if (null == value){
                this.setStatusNotFound();
                return ;
            }
        }
        finally {
            reference.lockReadExit();
        }

        this.setContentTypeText();
        this.println(value.toString());
        return ;
    }

}
